Indication: For 3 weeks has had pain in the left ankle medially. Not sure trauma history. Ultrasound: Shows edematically looking distal sections of the tibialis posterior tendon by the attachment of the tuberositas ossis navicularis compatible with tendinitis. An irregularity of bone's surface (tuberositas ossis navicularis) where tendon is attached.n addition, normal findings. No fluid or synovial for thickness in the talocrural joint.